This paper presents the results of a new monopole antenna that exhibits 2.75-10.7 GHz performance. The proposed antenna consists of a radiating patch with notches excited by capacitive coupling feed. Also, the antenna’s truncated ground-plane incorporates a central notch. This modification significantly improves the antenna’s impedance bandwidth by 118% over an ultra-wideband frequency range. T...

We introduce a novel merger of direct sequence code division multiple access (DS-CDMA) and smart antenna arrays. With regard to the DS-CDMA scheme, we employ carrier interferometry DS-CDMA (CI/DS-CDMA), a novel implementation of DSCDMA where chips are decomposable into N narrowband frequency components. With regard to the antenna array, we deploy the oscillating-beam smart array. Here, applying...

The application of Smart Antenna technology to wireless communication systems has attracted considerable attention over the last decade or so, as a means of capacity enhancement. Here, the application of space-time processing using a single antenna array at the base-station has been considered in order to obtain interference reduction (both co-channel and multi-path) as well as range extension....

A Kalman-filter based, vector autoregressive (VAR) model is used to forecast mobile user uplink spatial signatures and improve downlink signal-to-interference ratio in timedivision duplex (TDD) systems. Results are presented from computational electromagnetic (CEM) simulations of a smart antenna system operating at 1.8 GHz in an urban microcellular environment.

Multiple-input-multiple-output (MIMO) technology is a generic term used to describe techniques proposed to improve capacity, bandwidth efficiency or data rates for the next generation wireless communication systems. MIMO systems integrate multiple antenna elements with adaptive signal processing to provide smart array processing, diversity combining or spatial multiplexing capability. The perfo...

The chapter addresses the problem by presenting an analytical model for a 3-dimensional single folded loop antenna with detection coverage in space. Based on the antenna theory, the inductance and impedance of the loop antenna is investigated. Design issues including antenna topology, read range, tag orientations, proximity of metal and other antennas are addressed to determine proper antenna f...

The adoption of multiple antenna techniques in future wireless systems is expected to have a significant impact on the efficient use of the spectrum, the minimisation of the cost of establishing new wireless networks, the enhancement of the quality of service, and the realisation of reconfig-urable, robust, and transparent operation across multitech-nology wireless networks. Although a consider...

With the increasing use of smart weapons and sensors, there is a need to consider potential areas of improvement that could positively affect large numbers of systems with common concepts and approaches. One area that lends itself to this desire is the improvement of high precision high bandwidth antenna and mirror steering systems that can be utilized across a broad range of sensor systems. Po...

This paper focuses on the interaction and integration of several critical components of a Mobile Ad-Hoc Network (MANET) using smart antenna systems. A MANET is a wireless network where the communicating nodes are mobile and the network topology is continuously changing. One of the central motivations for this work comes from the observed dependence of the overall network throughput on the desig...

The suitable use of an array antenna at the base station of a wireless communication system can result in improvement in signalto-interference ratio (SIR). In the present work, we consider circular array (CA) and concentric circular antenna array (CCAA) that are used for smart antenna systems. The performance criteria for SIR improvement is employed in this paper, is the spatial interference su...